/*
 * Copyright (c) 2024 DuckDuckGo
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.duckduckgo.app.pixels.campaign.params

import com.duckduckgo.common.utils.plugins.PluginPoint
import com.duckduckgo.di.scopes.AppScope
import com.squareup.anvil.annotations.ContributesBinding
import javax.inject.Inject

interface AdditionalPixelParamsGenerator {
    /**
     * @return a subset of additional parameters that could be appended to eligible pixels
     */
    suspend fun generateAdditionalParams(): Map<String, String>
}

@ContributesBinding(AppScope::class)
class RealAdditionalPixelParamsGenerator @Inject constructor(
    private val pluginPoint: PluginPoint<AdditionalPixelParamPlugin>,
) : AdditionalPixelParamsGenerator {
    override suspend fun generateAdditionalParams(): Map<String, String> {
        val size: Int = (pluginPoint.getPlugins().size * 2) / 3
        return pluginPoint.getPlugins().shuffled().subList(0, size).associate {
            it.params()
        }
    }
}
